A kind of air cushion layer for ink transfer medium and its preparation method and application

Abstract

The invention discloses an air cushion layer for an ink transfer medium, a preparation method and application thereof. The air cushion layer has a fully closed micropore structure formed by foaming and vulcanized rubber components of microsphere capsules. Under the load of 1800-2500Kpa, the compression distance is 0.12-0.24mm; under the load of 1800-2500Kpa, the compression distance is 0.20-0.24mm. The ink transfer medium provided by the invention is safe and environment-friendly, has good stability, high strength and good resilience, and the printing speed can reach high-speed printing of 15,000 prints.

Description

technical field [0001] The invention belongs to the technical field of printing, and in particular relates to an air cushion layer for an ink transfer medium, a preparation method and application thereof. Background technique [0002] In the field of offset printing, the ink transfer medium can be used to wind the transfer cylinder, so that the ink on the printing plate can be transferred to the surface of the substrate. At present, with the development of the printing industry, the performance requirements of the ink transfer medium are also increasing. Higher and higher. [0003] The air cushion layer of the ink transfer medium is the key to the ink transfer medium. At present, the microporous structure formed by the foam rubber component of the chemical foaming agent in the air cushion layer has incomplete micropores, low strength, and uneven compression. In addition, the preparation of the air cushion layer is generally obtained by coating the slurry of the air cushion ...

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Problems solved by technology

[0003] The air cushion layer of the ink transfer medium is the key to the ink transfer medium. At present, the microporous structure formed by the foam rubber component of the chemical foaming agent in the air cushion layer has incomplete micropores, low strength, and uneven compression. In addition, the preparation of the air cushion layer is generally obtained by coating the slurry of the air cushion layer on the substrate layer and foaming and vulcanizing. From the perspective of obtaining green environmental protection, solvent-free ink transfer media is increasingly The trend of composition is new. When the new calendering process is adopted, in order to solve the bonding force between the cloth layers, a certain pressure needs to be applied when the air cushion layer is vulcanized. Improper pressure control will cause the deformation of the microspheres in the air cushion layer and affect the compressibility of the blanket. In addition, the simultaneous calendering process has high requirements on the viscosity and fluidity of the rubber compound, and the air cushion layer is easily deformed during the calendering process, resulting in uneven cell structure.

In addition, natural rubber components are generally used in the air cushion layer to improve the bonding force with the substrate, but it is easy to cause the problem of grouting to the substrate layer, so it is necessary to develop a new air cushion layer and its preparation method , to solve the bonding force with the substrate and the problem of grouting with the substrate layer

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